Electrodeposit winding



Patented Oct. 31, 1922.

UNITED i STATES PATENT AUSTIN KIMBLE, OF WAUSAU, WISCONSIN, .SSIGNSR T) MLRATHN COMPANY, 0F WAUSA, WISCONSIN., al CGR0R.TIGN

ELECTRODEPOSIT VJINDENG.

Application inea may ia, 1919. serial. No. 296,646.

1,10 machines, and especially tqlthe structure and method of forming a squirrel cage rotor.

The mainobjects of the invention are to provide a squirrel cage member of improved form adapted for high electrical elliciency, thorough ventilation, good starting characteristics and convenience in manufacture; and to provide an improved method. of forming such a devic .A n illustrative embodiment 'of this invention is shown in the accompanying draw? ings, in which- Fig. l is an end view of a squirrel cage rotor.

Fig. 2 is a section on the line 2-2 of Fig. n

Fig. 3 is an enlarged cross section through one of the Squirrel cage hars.

Fig. a is a sectionsimilar to Fig. 3 before platine.

In the construction shown in the drawings, the laminated core l is clamped rigidly together by any approved means, for. instance as indicated at 2, and mounted on a shaft, as usual for such devices.- On said 8i core is a ventilated squirrel cage Wi ding 3 comprising end rings 4 and connecting hars 5, said bars being disposed in the openings ti of the slotted core 1. Said Winding 3 is in the `form of an electrodeposit of -copper applied to an intermediate coating of zinc indicated at?.

By this means a compound squirreleage structure is provided in which a metal having substantial resistance is disposed against 45 the core and a. good conductor of much greater thicknessA is secured thereto and spaced from the core by the higher resistance metal. These metals, it is to be understood, are not necessarily limited to 'Zinc and copper. The hot metal dip prepares the core for ready deposit of the plating.

The double walled lhars 5 are hollow throughout their length and are thereby adapted tornei... lient ventilation. The com,

capacity desired, one-sixteenth ed, ventilation openings El will remsi pound structure orndiereut resistaoct als gives good starting qualities, l

` The .method o'j termiA ,n 'tie der deserihei'l is follows: The iamin being clamped together, is .iirst clean". paratory to galvanizing, then. tl. d galvanized, particularly over the areas to he occupied by the squirrel cage ivindii terthe galvaniaing deposit i is in piace, device is coated with "wax, except eral areas at the ends Ahere the cage end rings are to he located and in slots. A rubber hand 8 may aprl the outer face of the core. in place o! to prevent the deposit of copper thereon. The device is then placed in copper-plate hath, and a sr; ,cient deposit topper applied 'to form the end rings #i and necting hars directly over 'the surface. The thickness or he. Y. posit may he 'ze eater ory t the design of the machine and ordinarily being' suliieient. The lig. slots 6 are so designed that t ter the ce galvanized. and the copper l is deposit-- 'l slots are preferably round. and disposer. closely adje. 'ent t) the surface and may to advantage he open on their oifiter side 'us dieated at-'10. The foregoing (.'vznistroctir i offers a very positive and useful adi/a ta namely, the application ol"ordinariy dip ard plating methods to produce a winding chai.'4 acterized by hollow bar ventilation compound hi-metallic liar construction.

Although but one specific embodiment of this invention is herein forth, .it is to be understood that numerous details or' the.

constructionend vvmethod shown and described may he altered or emitted without departingr from the spirit of the invention' tor comprising a laminated core With .openJ ings disposed lengthwise adiacent to the surface thereof, a layer of in a position ci f'espondin squirrel cage 'svi in the form of sei-ving as a. binde? for ibs Coppin".

3. The xmthod ppig-ing a squrm wg@ Winding to a minaad @gres Whfehconss in gavanzing the wir@ and applying @n @Metro-deposit of Copper'ihex'eto in the ozm @fn squirrel cage winding.

#L The method 'of o'mnp; a squirrel cage' x'oto'r, which consists in gnlvzmzmg so ed core., applying a rubber band mound be cyinflicl outer 'face of the mm?? plynp; wax' i0 such @tha pm'ts or", 'le mmf :1s :we not to be occupied by the siliml iggned ai; Chicago this Stday of May,

AUSTIN KXMBLF. 

